Senior Network​/Security Engineer; Fortinet​/Cisco

Senior Network Engineer (Fortinet / Cisco) Details

Location:

Irving, TX 75039 (hybrid 4 days [M-TH] per week onsite)

Position Type:
Direct-Hire

Hourly / Salary: to $150K (based on experience)

Vaco is currently seeking a Senior Network Engineer (Fortinet / Cisco) for a Direct-Hire opportunity that is located in Irving, TX 75039 (onsite 5-days per week). The Senior Network Engineer will primarily focus on supporting the integration of acquired companies into the established enterprise network configuration, including assessment, standardization, and migration activities across network and security environments. The Senior Network Engineer will manage and optimize a large-scale enterprise network and security infrastructure and will design, implement, maintain and troubleshoot LAN / WAN, wireless, and data center networks, while ensuring high availability, performance, and security.

Additionally, the Senior Network Engineer will resolve escalated technical issues, mentor junior engineers, lead network projects, perform capacity planning, maintain comprehensive documentation, and drive continuous process and systems improvements.

• Enterprise Network / Security Operations
  – Managing Enterprise Network / Security Infrastructure Supporting Availability / Integrity / Stability / Performance Across Large-Scale Environments | LAN / WAN / Wireless Networks / Routing / Switching Consistency / Routers / Firewalls / Switches / IP-Based Communication Systems
• Network Engineering / Administration
  – Designing / Implementing / Maintaining Enterprise Network Infrastructure | Supporting Performance Monitoring / Bottleneck Resolution / Capacity Planning / Infrastructure Scalability / Global Connectivity / Operational Stability
• Technical Support / Operations
  – Resolving Escalated Network Issues | Managing Monitoring / Alerting / Incident Activities / Enterprise Ticketing Processes / Operational Issue Resolution / Incident Documentation | Providing Advanced Troubleshooting Support
• Security / Governance
  – Maintaining Security Controls (Firewalls / Access Controls / Intrusion Detection) | Supporting Change Management / Operational Governance / Process Improvements / Enterprise Standards Alignment
• Infrastructure Delivery / Cross-Functional Collaboration
  – Managing Infrastructure Software / Hardware Initiatives / Technical Analytics / Reporting / Documentation / Knowledge Base Contributions | Coordinating Cross-Functional Resources Supporting Technology Projects / Enterprise Implementations
• M&A Network Integration
  – Supporting Acquired Company Network Integration / Infrastructure Standardization / Migration Activities | Aligning Legacy Environments to Enterprise Standards
• Documentation / Continuous Improvement
  – Developing Technical Documentation (Diagrams / Procedures / Configurations) | Supporting Technology Modernization / Process Enhancements / Operational Visibility / Long-Term Infrastructure Scalability

The core mission is to lead the migration and standardization of a large, acquired network into an established enterprise “golden configuration.” This involves assessing the acquired environment, performing gap analysis, designing migration strategies, and executing large-scale cutovers across Cisco (Nexus 7k/9k / Catalyst) and Fortinet (Forti Gate / SD-WAN / Forti Manager) environments while maintaining HA and security. This role will require a combination of deep technical expertise in Cisco Routing / Switching and Fortinet Security with strong integration leadership to consolidate hundreds of sites into one standardized, high-performing network.

This is a high-impact role blending hands‑on engineering, project leadership, and cross-team coordination during a critical growth phase, with the…